Redeemable Convertible Preferred Stock and Stockholders' Equity (Deficit) - Additional Information (Details) $ / shares in Units, $ in Millions		12 Months Ended
	Jun. 16, 2016	Dec. 31, 2016 USD ($) $ / shares shares	Dec. 31, 2015 USD ($) $ / shares shares	Jul. 20, 2016 USD ($) shares
Redeemable Convertible Preferred Stock and Stockholders Deficit Equity [Line Items]
Outstanding shares of redeemable convertible preferred stock converted into common stock | shares				8,531,146
Preferred stock, conversion ratio	0.0833	0.0833
Common stock, shares authorized | shares		495,000,000	15,041,000
Common stock, par value | $ / shares		$ 0.001	$ 0.001
Common stock, voting rights		Each holder of the common stock is entitled to one vote per common share
Common Stock
Redeemable Convertible Preferred Stock and Stockholders Deficit Equity [Line Items]
Carrying value of redeemable convertible preferred stock | $				$ 106.1
Warrants outstanding | shares			25,000
Stock warrants exercise price per share | $ / shares			$ 2.52
Warrants exercise date		Jul. 31, 2016
Series 1 Redeemable Convertible Preferred Stock
Redeemable Convertible Preferred Stock and Stockholders Deficit Equity [Line Items]
Preferred stock, conversion ratio		1.00
Series 2 Redeemable Convertible Preferred Stock
Redeemable Convertible Preferred Stock and Stockholders Deficit Equity [Line Items]
Preferred stock, conversion ratio		0.80
Stock warrants exercise price per share | $ / shares		$ 0	$ 9.318
Redeemable Convertible Preferred Stock
Redeemable Convertible Preferred Stock and Stockholders Deficit Equity [Line Items]
Redeemable convertible preferred stock accretion value non compounded interest percentage		7.00%
Accretion to redeemable convertible preferred stock value | $		$ 6.3	$ 11.3